Utilization categories for AC voltage
Utilization categories for contactors according to IEC/EN60947-4-1
| Type of current | Utilization category | Typical application |
|---|---|---|
| AC | AC-1 | Non-inductive or low-inductive load, resistance furnaces |
| AC-2 | Slipring motors: starting, switching off | |
| AC-3 | Suirrelcage motors: starting, switching off while running | |
| AC-4 | Squirrel-cage motors: starting, regenerative braking, reversing, jogging | |
| AC-5a | Switching gas discharge lamps | |
| AC-5b | Switching of incandescent lamps | |
| AC-6a | Switching of transformers | |
| AC-6b | Switching of capacitor banks | |
| AC-8a | Switching hermetically sealed cooling compressor motors with manual reset of the overload release | |
| AC-8b | Switching hermetically sealed cooling compressor motors with automatic reset of the overload release | |
| DC | DC-1 | Non-inductive or low-inductive load, resistance furnaces |
| DC-3 | Shunt motors: Starting, braking by reversal, inching, dynamic braking of DC motors | |
| DC-5 | Seriers motors: Starting, braking by reversal, inching, dynamic braking of DC motors | |
| DC-6 | Switching of incandescent lamps |
Utilization categories for auxilliary contactors according to IEC/EN60947-5-1
| Type of current | Utilization category | Typical application |
|---|---|---|
| AC | AC-12 | Controlling ohmic and inductive loads when isolation through optocouplers is used |
| AC-13 | Controlling semiconductor loads when isolation through transformers is used | |
| AC-14 | Controlling small electromagnetic loads (≤ 72 VA) | |
| AC-15 | Controlling small electromagnetic loads (≥ 72 VA) | |
| DC | DC-12 | Controlling ohmic and electronic loads when isolation through optocouplers is used |
| DC-13 | Controlling DC electromagnets | |
| DC-14 | Controlling electromagnetic loads with built-in economy resistors |
Utilization categories for load switch, disconnector, circuir breaker and Switching-safets-units according to IEC947-3, EN60947, DIN VDE0660 part 107
| Type of current | Utilization category | Typical application |
|---|---|---|
| AC | AC-20A(B) 1) | Making and breaking without load |
| AC-21A(B) 1 | Switching of ohmic loads, including small overloads | |
| AC-22A(B) 1) | Switching of mixed ohmic and inductive loads, including small overloads | |
| AC-23A(B) 1) | Switchung of motors or other high-inductive loads | |
| DC | DC-20A(B) 1) | Making and breaking without load |
| DC-21A(B) 1) | Switching of ohmic load including little overload | |
| DC-22A(B) 1) | Switching of mixed ohmic and inductive load including little overload (eg. shunt motors) | |
| DC-23A(B) 1) | Switching of motors or other high inductive load (eg. inverse-speed motors) |
1) A: frequent actuation, B: casual actuation
All the switchgears in our range of products are designed in accordance to VDE0660 for the utilization category AC-3. For the permissible power data, please see the respective options.